Need RingCentral for Windows Desktop app version 8.0.4

Cant uninstall or update RingCentral on a PC that has need been used for a long time. The error says the PC is missing RingCentral for Windows Desktop Version 8.0.4. In order to uninstall or update the application the installer of 8.0.4 version is needed. I have called RC support and was told they dont have a copy that old. Any ideas??